I've had the tractor since June and the front wheels, with the industrial tires, can only be set up one way. The manual is clear about not widening the wheels, so no, haven't tried anything with the fronts. I'm hopeful the four inch spacers for the rear wheels will feel as good as many posters have reported.
I should get them in another week or two, and will probably have them installed in five to six weeks when the tractor goes in for 50 hour service.